Can NVIDIA GeForce RTX 4090 run HunyuanVideo?
13B parameter Video Gen model on 24GB GDDR6X
VRAM Requirements
HunyuanVideo is a 13B parameter model. At full precision (FP16), it requires 40GB of VRAM. Your NVIDIA GeForce RTX 4090 has 24GB, so you'll need to quantize it to 8-bit (Q8) to fit.
Maximum quality, no quantization
Near-lossless, ~50% size reduction
Good quality, ~75% size reduction
Recommended system RAM: 48GB DDR5 (2x GPU VRAM minimum for model overflow)
What This Means in Practice
HunyuanVideo at 8-bit precision on NVIDIA GeForce RTX 4090 generates video clips with near-identical quality to full precision. Generation times are similar — video gen is bottlenecked by compute more than memory at this precision. A solid setup for local video generation.
NVIDIA GeForce RTX 4090 Specs
Other GPUs That Run HunyuanVideo
Other Video Gen Models on NVIDIA GeForce RTX 4090
About HunyuanVideo
Tencent's text-to-video model. Generates high-quality 5-10 second video clips. One of the best open-source video generators available. Needs significant VRAM — 24GB+ recommended.